1975 850t

[n3303j]

Do you all think this oil leak is coming from the oil pan seal?

Looks like it's from the bell housing. Give it a sniff to see if it's transmission or engine. Seals, gaskets, vent tube hose, etcetera could be the source. If it is in the bell housing it's transmission removal to fix. But first check that a breather hose isn't cracked and leaking down thru the housing.

[John A]

Check by smell if it’s engine oil or transmission oil. Engine oil will leak from cam plug, rear main seal etc. gear oil can be identified by its odor and will come from oil seals either on the shafts or the clutch pushrod. How much is coming out?

[850brian]

Check by smell if it’s engine oil or transmission oil. Engine oil will leak from cam plug, rear main seal etc. gear oil can be identified by its odor and will come from oil seals either on the shafts or the clutch pushrod. How much is coming out?

A decent amount. I wiped it clean and then took the picture above after a minute or two.

[850brian]

Check by smell if it’s engine oil or transmission oil. Engine oil will leak from cam plug, rear main seal etc. gear oil can be identified by its odor and will come from oil seals either on the shafts or the clutch pushrod. How much is coming out?

Also it's hard to tell but I believe it's engine oil.

[n3303j]

Also it's hard to tell but I believe it's engine oil.

First check that the breather hose coming out the top of the engine isn't leaking into the bell housing and dripping out the bottom.
If not then you get to pull the transmission and address all the internals. Might as well do both main seals as well as the other problem areas while in there. I lift the bike off the engine / transmission assembly. Then split the two. It's easier for me to address clutch reinstallation with the engine on its face. Others crab the frame,  which didn't work well for me. I built a copy of the factory engine support and installed a pair of come-along hoists from the ceiling to lift / lower the frame off the engine.



It's a V11, but the T3 is done the same way.

[850brian]

First check that the breather hose coming out the top of the engine isn't leaking into the bell housing and dripping out the bottom.
If not then you get to pull the transmission and address all the internals. Might as well do both main seals as well as the other problem areas while in there. I lift the bike off the engine / transmission assembly. Then split the two. It's easier for me to address clutch reinstallation with the engine on its face. Others crab the frame,  which didn't work well for me. I built a copy of the factory engine support and installed a pair of come-along hoists from the ceiling to lift / lower the frame off the engine.



It's a V11, but the T3 is done the same way.

Definitely was not looking forward to this answer... :(

[n3303j]

Maybe you'll get lucky and find the 48 year old breather hose is cracked and dribbling back thru the bell housing. That's just a "remove the tank and inspect" job.

[850brian]

Maybe you'll get lucky and find the 23 year old breather hose is cracked and dribbling back thru the bell housing. That's just a "remove the tank and inspect" job.

Fingers crossed. I will post an update later today or tomorrow,  happy new years as well!

[John A]

If you’re lucky it’s the clamp on the large breather hose coming out of the top of the engine needing tightening the oil runs down the sides of the spigot and follows the back of the engine case to come out the rectangle hole. If you’re lucky…

[850brian]

Is this the hose in question? If so it is cracked but I am still confused on how oil would end up coming out near the oil pan.


anonymous image hosting

[n3303j]

Hose #37 can crack and drool oil over the attached breather manifold. It then passes through the bell housing and out the bottom.

(Or possibly #39)

[John A]

Hose #37 can crack and drool oil over the attached breather manifold. It then passes through the bell housing and out the bottom.

(Or possibly #39)

Wot he said ^^^^ the gasket #2 as well , but that’s under the flywheel so it’s renewed at a clutch change. The hose #37 is about the only thing that can be leak fixed without engine/transmission separation.

[matt franklin]

The engine seals on that old nail are as hard as Chinese arithmetic by now.  If they aren't leaking like crazy now, they will be in a few miles.  do yourself a favor and change them out.  Front main, rear main, front and rear gearbox, and inside and outside rear drive seals.  Basically all the rotating shaft seals.  Then do the forks...

[850brian]

Ahh. I see. I will give these a look. Have a crazy January but I will start tinkering!

[Turin]

If you are going to do the rear main seal, it might be a good time to replace the clutch.

[jrt]

Actually, getting the engine and transmission out of the frame isn't too bad.  Look up "crabbing the frame" for some tips.  You basically block up the motor and lift the frame off it, rather than wrestle the motor out of the frame. 
And- in the picture above- hose #37 is oriented vertically- it comes UP out of the bell housing. 

[850brian]

Actually, getting the engine and transmission out of the frame isn't too bad.  Look up "crabbing the frame" for some tips.  You basically block up the motor and lift the frame off it, rather than wrestle the motor out of the frame. 
And- in the picture above- hose #37 is oriented vertically- it comes UP out of the bell housing.

Would it be okay to make my own hose?

[John A]

Would it be okay to make my own hose?

you can but it i dont remember if its an odd size

[Moparnut72]

When I worked in a NAPA store we made hydraulic hoses but weren't permitted to make brake hoses. I don't know if it was due to state regs or corporate policy, we didn't even stock those parts.
kk

[850brian]

On a separate note, I also noticed on my first ride that the speedo was not working. Is there a common fix for this issue? Rpm Gauge works.

[chuck peterson]

Is this the hose in question? If so it is cracked but I am still confused on how oil would end up coming out near the oil pan.


anonymous image hosting


Nope that’s #47…the exit to air …thicker hose then the other two…exits down to the ground…on a Vert you can run it out to below the rear axle

[chuck peterson]

Would it be okay to make my own hose?

NAPA, or most any car parts have fuel injection line etc to choose from..

There is a check ball valve sitting in a hose in the top of the engine case that you want to make sure is loose and working…my breather box had a secondary flapper doing the same job..per Guzziology you disarm the flapper in the breather box to depend on just the check ball valve.. forget which version is the newest

Don’t fix anything yet if it’s not broken..you’re pulling it together! Don’t let the naked guzzi fotos scare you..

[chuck peterson]

On a separate note, I also noticed on my first ride that the speedo was not working. Is there a common fix for this issue? Rpm Gauge works.

Make sure both ends are snug…a half turn tighter fixed mine. Do not remove the transmission end for now…there’s some bits in there I forget about but check the diagrams maintenance manuals

[850brian]

Make sure both ends are snug…a half turn tighter fixed mine. Do not remove the transmission end for now…there’s some bits in there I forget about but check the diagrams maintenance manuals

I'm sorry both ends of what?

[chuck peterson]

I'm sorry both ends of what?

Speedometer cable

[850brian]

Speedometer cable

Oh.. duh haha Tha k you

[850brian]

ok moving along full steam ahead, but a new problem has presented itself. the headlight works with both regular and high beams but none of the turn signals nor brake light is working. bulbs seem to be fine.

[850brian]

Update:
Flasher relay was garbaged so I installed a new one and still nothing.

[Antietam Classic Cycle]

Update:
Flasher relay was garbaged so I installed a new one and still nothing.

If you installed a new thermal flasher (little metal can), there's a good chance it's bad right out of the box. Every one I bought a few years ago was bad, switched to electronic flashers from Amazon.

[850brian]

If you installed a new thermal flasher (little metal can), there's a good chance it's bad right out of the box. Every one I bought a few years ago was bad, switched to electronic flashers from Amazon.

I got one of the black box ones.